[TargetLowering] Remove stale FIXME. NFC

This was implemented for scalars in D140750.

diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index f7e6003..b7b5d79 100644 (file)
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -6039,8 +6039,6 @@ SDValue TargetLowering::BuildUDIV(SDNode *N, SelectionDAG &DAG,
   auto BuildUDIVPattern = [&](ConstantSDNode *C) {
     if (C->isZero())
       return false;
-    // FIXME: We should use a narrower constant when the upper
-    // bits are known to be zero.
     const APInt& Divisor = C->getAPIntValue();
 
     bool SelNPQ = false;